Weakening steering currents over the United States have caused Isaac's forward speed to slow.

According to AccuWeather.com Hurricane Expert Dan Kottlowski, "A slow-moving tropical storm or hurricane has the potential to drop tremendous rainfall and produce major flooding."

Meanwhile, folks over the Mississippi, Ohio, Missouri and Arkansas basins would welcome any non-flooding rainfall. A large part of this area remains in a drought as a result of the blistering summer of 2012 and abnormally warm and dry conditions during the winter of 2011-12.

Expert Senior Meteorologist Alex Sosnowski contributed to the content of this story.